A debris disk around the central star of the Helix Nebula?

K. Y.L. Su, Y. H. Chu, G. H. Rieke, P. J. Huggins, R. Gruendl, R. Napiwotzki, T. Rauch, W. B. Latter, K. Volk

Research output: Contribution to journalArticle

69 Scopus citations

Abstract

Excess emission from a pointlike source coincident with the central star of the Helix Nebula is detected with Spitzer at 8, 24, and 70 μm. At 24 μm, the central source is superposed on an extended diffuse emission region. While the [O IV] 25.89 μm line contributes to the diffuse emission, a 10-35 μm spectrum of the central source shows a strong thermal continuum. The excess emission from the star most likely originates from a dust disk with blackbody temperatures of 90-130 K. Assuming a simple optically thin debris disk model, the dust is distributed in a ring between ∼35 and ∼150 AU from the central star, possibly arising from collisions of Kuiper Belt-like objects or the breakup of comets from an Oort-like cloud that have survived from the post-main-sequence evolution of the central star.

Original languageEnglish (US)
Pages (from-to)L41-L45
JournalAstrophysical Journal
Volume657
Issue number1 II
DOIs
StatePublished - Mar 1 2007

Keywords

  • Infrared: stars
  • Stars: individual (WD 2226-210)
  • White dwarfs

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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    Su, K. Y. L., Chu, Y. H., Rieke, G. H., Huggins, P. J., Gruendl, R., Napiwotzki, R., Rauch, T., Latter, W. B., & Volk, K. (2007). A debris disk around the central star of the Helix Nebula? Astrophysical Journal, 657(1 II), L41-L45. https://doi.org/10.1086/513018